While Tesla was only 20th out of 40 brands in total sales, all of its sales were of one single model. Other brands, including the leader Volkswagen (at 1,512 total sales), had sales spread across multiple models.

Plug-in electric cars took 8.6 percent of the market overall, at 1,044 sales, with all but a tiny fraction of them battery-electric vehicles.

The comparable figure for the U.S. is less than 1 percent.

The two highest-selling electric cars in Norway were the Model S and the Nissan Leaf, which together represented 85 percent of all plug-in sales last month.